Knotting device for machines for manufacturing knotted carpets



Nov. 4, 1930.

A. BLUM 1,780,740 KNOTTING DEVICE FOR MACHINES FOR MANUFACTURING KNOTTED CARPETS Filed July 25, 1928 6 Sheets-Sheet 1 Fig. 1.

Nov. 4, 1930. A. BLUM 1,780,740

KNOTTING DEVICE FOR MACHINES FOR MANUFACTURING KNOTTED CARPETS Filed July 25, 1928 6 Sheets-Sheet 2 Nov. 4, 1930. A. BLUM 1,780,740

KNOTTING DEVICE FOR MACHINES FOR MANUFACTURING KNOTTED CARPETS Filed July 25, 1928 6 Sheets-Sheet 3 Nov. 4, 1930. A. BLUM 1,780,740

KNOTTING DEVICE FOR MACHINES FOR MANUFACTURING KNOTTED CARPETS Filed July 25, 1928 6 Sheets-Sheet 4 C:TI:IZ;T:II::I:TIT; ;I ,y L GD \L 1 Nov; 4, 1930. A. BLUM 1,780,740

KNOTTING DEVICE FOR MACHINES FOR MANUFACTURING KNOTTED CARPETS Filed July 25, 1928 6 Sheets-Sheet 5 Noki. 4,- 1930;

A.Y BLUM KNOTTING DEVICE FOR MACHINES E'OR. MANUFACTURING KNOTTED CARPETS 1928 6 Sheets-Shea? 6 Filed July 25 Patented Nov. 4, 1930 UNITED sTATEs v PA E T OFF C ALBERT BLUM, OF RAPPERSWIL, SWETZERLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 AKTIENGESELLSCHAF T Fil'R MEGHANISCHE.KN'fiP FTEPTEICI-IE SYSTEM BOYEB,

I or ZURICH KNOTTING DEVICE sonivri oniivns non MANIUFAQTURING KNOTTED'I'CARPETS Application filed July 25, 1928,, Serial No.

Knotting devices as heretofore employed in knotted carpet machines have two material disadvantages.

The tongshaped knottingdevices generally used require a relatively large space and for this reason are inapt for simultaneously making groups of knots, they are'necessarily arranged at certain distances one from the other and are adjustable over a given warp thread row making it possible to cause the same to successively tie pile knots.

Other knotting devices which upon first sight appear adaptable for making pile knots in groups are provided with hookshaped knotting members which, however, are oper ated with very complicated movements for knot-ting the pile thread.

In both of these known many technical disadvantages are inherent which limit their possibility of application and their reliability in the :knotting operation.

In the present invention the knotting' device is constructed in such a manner that from the two movements which both catcher and knotter tools are compelled to make in working, at least the'movement of one of these tools is limited to a single forward and backward motion. In the working example to be described hereinafter the operating motions of both the catcher and the knotter are limited to a single forward and backward motion.

It is evident that under such conditions greater speed and more reliable operation,

saving. of time and a larger output will be obtained than with known devices which require a number of such motions of the fundamental members, such as the catcher and the knotter.-

' A particular advantage of the knotting device made in accordance with my present invention resides in the fact that the catchers which are arrangedrelatively close together and which are adjustable above a plurality,

of warp threads, are adapted both for the manufacture of the pile knots in groups sicessively, without modifying the movements types of I devices mam in Switzerland my 7,1928.

of the 'knotting device in changing from on kind of manufacture to the other.

The attached drawings show by way of example one working form of the'inv'ention.

Figure 1 is a side elevation showingpositions of the catcher and of the knotter when =1 at rest and the feeder in the starting posi- C1011, I Fig. 2 is a side elevation showing the I feeder in front of awarp thread and the catcher inthe catching position,

Fig. 3 is a side elevation showing the catchor after having engaged the pile thread, the knotter being swung forward,

' Figs. l, 5 and 6 are side elevations showing the engagement of the catcher and the grasping of thepile thread by the knotter.

Fig, 7 is a side elevation showing the formation and the tying of the pile knot,

Fig. 8 is a front elevation showing the position when the pile knot is grasped, I

Fig. 9is a plan view showing the position when the pile knot is grasped;

Fig. 10 is a plan View showing the position of the catcher as in Fig. 3, I

Fig. 11 is a plan View of the catcher r0- tat-ed 90 as inFig. 4;,

Fig. 12 is a plan View of the catcher rotated 180 and the knotter in its grasping operation, as in Fig. 6, I 80 Fig. 13 is a plan View showing the formation of the pile knot as inFig. 7,

Fig. 14 is a plan view showing the relative position of rack and gear wheels,

Fig. 15 is a partial rear elevation showing the gear wheels and rack, I r Fig. 16 is a partial rear elevation showingkthe arrangement" and movement of the Tao 7 J V i Fig. 17 is a side elevationshowing the arrangeinentof the catchers and knotters, and

Fig. 18' is a plan'view showing the arrangement of the members for forming the knots successively. p

lVarp threads are referred tothroughout the figures by 1; in the machine for manufacturing knotted carpets they are of course I jtightly stretched. Pile thread 2 is; guided multaneously and for their manufacture sucin a knot.

By means of the working example the 'operation is clearly illustrated. As will be seen from Figs. 1 to 7 a catcher sleeve13 is provided rearwardly. of each pair of warp threads. This sleeve is carriedin arms 4 and 5 of a U-shaped stationary support 6. The catcher sleeves 3 are slitia'nd are provided at the end of the slit with acentral hole forthe passage of acatcher 'rod7. That part of. the catcher rod lying within the slit isof a greater diameter than the rear end thereof. The catcher rod 7 V is provided with twofiat sides 8 ((see Fig. 9) carrying two catchers 9'which, in this manner, "are axiallyoperated together by the-catcher rod 7. The flat bar 8 of the catcher rod? with the catchers 9 completely fill th'eslit of the catcher sleeve 3 (Figs. 8 and 9,). and rotatein a corresponding bore or bearing in" the arms 5 of the support 6. r I The rearward end of the catcher rod7 is mounted to turn in an adjustable bent member 10' (Figs. 1 t0 5) but is-prevented from moving axially therein by means not shown in the drawing. If the bent member 10 is moved in the direction of the arrow' (Fig.2),

- the catcher rod 7 together-with the catchers 9 is moved towards the, warp threads l, if

' the movement is in the directionof the arrow (Fig.3), thecatcher rod is movedaway from the vwarp threads. I l j .The non-slitted rearward end of the catcher sleeve 3fwhich projects somewhat beyond thearm 4 in which it is carried is constructed as a pinion 11.. As shown in Fig. 14 a rack bar 12 meshes simultaneously with the pinion-11 of eachcatcher sleeve3. The catcher sleeves are arranged side by side. The rack bar 12 is actuated-by a'toothed segment 13 keyed on, a rotating'spindle 14" and a lever arm '15 which may be turned to the left or to the right. On one side of the-rackbar 12 "gment-to the rack bar 12.

spondingly placed. f Figs. 17 and 18 show in elevation and in planthe arrangementof the knotting mem bers intended for tying the knots succe's- .there "is a small rack 16 rigidly connected thereto and into the teeth of which mesh the teeth of'the segment 13 (Figs. 14 and 16) thusftransmitting the movement of the seg In front of the warp threads 1 are dis- ,lposedin the usual manner, front swinging; *knotting tools17 (see. Figs. 1 to 7), which may be swung in the direction of the arrow in 6 towards the warp threads and away from them. Between spring clips 18 of these knotting tools 17 are arranged in a guide rail knotters' 19 (Figs. 1 t'o 7), the movement of which is represented in Figs. 17 and. 18.

f Figs. 14, 1 5 and 16 show how'the'catcher rods 7 with catchers 9 for group knotting arearranged close together.

The knotters 19 arranged in front of them-may be corresively.

Parts of the knotting members are fixed on a catcher carriage 21 and other parts I thereofon a knotter'carriage 23. The catcher'carriageslides in a guide 22 and the knotter carriage slldes in a guide 24. The movements of both carriages are the same; The

"description is hereinafter limited 'to the 'movement ofzthe catcher carriage-I In a bearing 25 (Fig.'18).of a guidewall 26 is arranged a-rotating spindle .27.. which is prevented from, an axial displacement by V *a-shoulde'r- 28 andby a fixed ad usting ring 29.. In front ofthe shoulder 28, keyed on a spindle extension 30,"are two ratchet wheels 31 and 32,-the teeth of one transmittingmoqtion" to the: left and the other to the right.

An oscillating ratchetlever 33 is placed in front of the ratchet wheels'and is prevented from slipping by an adjusting ring 34. On the side of the ratchet "lever '33'there is a rocker sleeve 35 provided with pawls 36 and 37which are oppositely disposed and of 1 which either one at a time is engaged with the corresponding ratchet wheel by means or a suitable spring or otherwise. Owing to. the upward and downward m'ovementof the ratchet lever 33. owingto thecorresponding adjustingof the paw'ls 36 and 37 respec-j 1 tively thespindle 27 will either be turned to.

the left. or to the right; The catcher, carriage 21 thereby is moved forward or backward as a spindle nut 38 'is' fixed rigidly below said carriage and the spindletraverses the said nut. The catcher carriage travels at the same speed during its forward and" backward movements which are of equallength.

The 121K131 movements of thecatchers '9 and the knotters 19 are s'hownin gs.17 and ter. there is a hinge member 41 which is arranged ranged rigidlyin the levers 32 and 43 suitably rotatablyon the bar 42. The latter is arspaced, and which areirigidly connected with the shaft 44, journaled in bearings 45 pro vided on the knotter carriage 23. A lever 46 is rigidly arrangeden the extremity of the shaft 44 and a swinging movement of the lever 46 causes a swinginginovement of the levers 43; thereby effecting the forward and backward movement of the knotters 19. In securing the. appropriate d stance between the hinged members 41 spacer inembers47 are provided which arefitted on the bar 42. The pile thread v2 'is"swung-,in the usual manner'bya feed member20 (Figs; 1, 2 and by suificient lowering of feed member 20.

turned over to the catchers 9 1 (see Figs. 2, 8 and 9). The catchers 9will thereupon return in the position as shown in Fig. 3 taking along the ends of the pile thread 2 and grasping it resiliently as shown in Fig. 10. A.

movement of the rack bar 12, which gears with the pinions of the catcher sleeves 3,, will cause these pinions together with the catchers 9 to rotate approximately 180, and to be' shifted from the position shown in Fig. 3, through that shown in Fig. 4, rotated 90, to the positionshown in Fig. 5 taking along both ends-of'the p'ile thread which in this manner are crossed behind each pair of warp threads 1. Itwill therefore be seen that there is a rotation of the pile thread from the position in Fig. '10 to that of Fig. 11 and thereafter to the position shown in Fig. 12. i

In the meantime the front knotting tools 17 swing from the position of Fig. 1 in the positions as shown in Figs. 3 to 5, and the knotters 19 will slide between a pair of warp threads 1 and below the corresponding cross of the pile threads (see Figs. 6 and 12). On

their return stroke the knotters 19 will take along the ends of the pile threads 2, the catchers releasing them (Fig. 7) so that a known carpet knot (Figs. 7 and 13) -is formed. Thereupon the knotters 19 will disengage the ends of the knot which now will form the carpet pile, and the knotting tools 17 will return to their initial positions whilst simultaneouslythe catcher sleeves 3 owing to a corresponding motion of the tooth segment 13 will be turned back so that the work- ;ing operation just described begins anew.

In the case of successive knotting (Figs.

.17 and 18) the movements for the knotting operation are the same as those for the hereinbefore described working operation for group knottmg. Afterthe knotting in ac- I cordance with Fig. 18 has been finished the movement of the spindle as already described will displace the knotting members (1n the direction of the arm of Fig. 18 and also in the opposite direction) over a pair of warp threads, for instance, over the warp thread pairs at, b, c, of Fig. 18 and so forth until the whole series has been provided with knots.

If the-bent members 10 and the arms 1 and 5 of the support 6 are provided with bores for the close arrangementof the catchers similar to Fig. 1 1 and if the rack bar 12 is:

toothed over its whole length the necessary catchers for group knottlng may be insertwill bereduced or stopped entirely.

ed if the division of the :warp threads has been arranged accordingly. Manifestly the carriage 23 must be'provide-d with the required slitsi'for securing: the lmotting tools 17 and the corresponding number of link members 41 must be employed, and the spacer members 47 replaced by perforated disks .of corresponding diameter. a. For group knotting the spindle movement What I claim is: J 1. In a machine forthe manufacture of knotted carpets, knottingtools including-a "catcher and a knotter, means for. moving one of sa1d tools for engaging a pile thread to a) draw the same over predetermined warp threads, means for turning saidtool after the same has drawn the pile thread over the predetermined warp threads thereby crossing the ends of the pile thread, and means for 555 then moving the other'tool to engage. "the crossed pile thread to draw the same between said warp threads, thereby tying the pile thread to the warp threads. v

2. In a machine for the manufacture of knotted carpets, knotting tools including a catcher and a knotter, means for movinga pilethread intoposition relatively to a plurality of warp threads in. a common plane, means for moving one of said knotting tools 0525 for engaging the pile thread to draw the same over a predetermined set of warp threads without moving the warp threads from their common plane, means for turning said tool after the same has drawn the pile thread 0ver21 the set ofwarp threads thereby crossing the ends of the pile thread,.and means for then moving the other tool to engage the crossed pile thread to the warp threads. p

3. In amachine for the manufacture of knotted carpets, knotting tools including a catcher and a knotter, means for moving. the catcher for engaging a pile thread to draw the E31 0 same over a pair of warp threads, means for turning the said catcher after the same has drawn the pile thread over the warp thread thereby crossing the ends of the pile thread, and means forthen moving the knotter to engage the crossed pile thread to draw the same bacl'c'between the said warp threads, thereby tying the pile'thread to the warp threads. l

4. In a machine for the manufacture of knotted carpets, knotting tools including a catcher,a knotter'and a feeder for moving a pile thread into position relatively to a series of warp threads in a common plane, means for moving the saidcatcher to engage the pile thread to draw the same over a set of warp threads while in'their common plane, means for turning the said catcher after the same has been drawn over the said set of warp crossed pile thread'and redraw the same be- I catcher, a knotter and. means for feedinga pilethread to position, the catcherbeing on I "is one sideofa chain of warp threads in a com.-

mon plane and the knotter,'together with the means for feeding the pile thread to position, being on the other side of the warp threads, means for moving the-catcher between predetermined warp threadsfto engage the pile threa'd and draw the same over a set'of warp threads, means for then turning the catcher thereby crossing theends .01": the pile thread, :and means for moving 'the 'knotter between the said-set ofwarpithreads to engage the tween the set of warp. threads to thereby tie the pilethread to the warp threads.

6. Ina machine for the manufacture of l lrnotted-carpets, knottingtools including a catcher, a knotter and a feedertor moving a pile thread intoposition, the catcher lying on one side o-f'a plurality of warp threads'in a common plane and the feeder and the knot ter lying on the opposite side of the said warp threads, means for moving the catcher be tween predetermined warp threads to engage the pile thread and to draw-the pile thread over apairof warp threads withoutmovcatcher, a knotter and a feeder for moving a .ing the warp threads from their common plane, means, then operative to turn the catch-- er thereby crossing the ends of the pile thread, and means for'then movingthe knotterbetween thesaid pair of warp-threads to engage the crossed pile thread and redraw the same between the said'pair o-fwarp threads, thereby-tying the pile thread tothewarp threads. 7 I

' :7. In a machine for" the manufacture of knotted carpets, knottingtools including a pile thread intoposition relatively to a'plulrality of warp threads in a common plane,

means for reciprocating the catcher and also turning the same to cause the catcher to first pass between predetermined warp threads to c engage the pile thread and draw the pile thread over asset of warp threads after which the catcher turnsfa semi-revolution thereby crossing the ends of the pile thread, and

,mea-ns for reciprocating the knottercausing 'the same, to pass between the set of warp threads to-engage the crossed pile thread and redraw the pile thread between the set of to the warp threads. ,8. In a machine warp threads, thereby tying the pile thread forthe manufacture of knotted carpets, a rod,'a set of catcher members carried by the said rod, a bearing for the saidrod and catcher members, means for thread to-the warp threads.-

reciprocating the rod and catcher members to pass the catchermembers between predeterminedl warp threads to engage a pile thread and to draw the pile thread over a set of warp threads, meansithen operativeto' turn the rodand catchermembers, with'the pile thread engaged thereby, a semi-revolution' thereby crossing the ends of the pile I thread," a knotter, and means tor reciprocat ing the knotter to move the same between the set of warp threads to engage the crossed pile threadland to draw the same between the set of warp threads, thereby tying; the pile 9. In a machine for the manufacture of knotted carpets, a rod, a pair of catchers mounted in oppositely disposed grooves in the said rod, asleevein whichthe saidrod and catchers are mountedtoslide, a bearing in which the said sleeve is. mounted to turn, means for rec procatlng the saidwrod and catchers in the sleeve causing the catchers to pass between, predetermined warp threads to engage a pile thread and to draw thesame around a set of warp threads, means operative upon the return of the catc'hers for turning the sleeve, rod and catchers a semi-revolution thereby crossing the ends' of the pile thread, a knotter, and means for reciprocate v ing the knotter causing the same to move be tween the set of warp threads toengage the crossed pile thread to draw the p lethre'ad between the set of warp threadsto thereby tie thepile thread to, the warp threads.

y 10. In a machine forthe manufacture of knotted carpets, a rod, apair of catchers mounted in oppositely, disposed grooves in thesaid rod, a sleeve in which the said'rod and catchers are mounted.toreciprocate, a

bearing. infwhich the said sleeve is journaled to turn, the said rod and catchers being on one side of a series of warp threadsin a com mon plane, means for reciprocating the rod and catchers causing the catchers to move between predetermined warp threads and engage a pile thread and to draw the pile thread over a set'of warp threads, a pinion carried by the said'sleeve, a rack engaging the pinion, f means for operat ng [the rack after the catchers have drawn thepile thread over the set of warpthreads to then turn the sleeve and the catchers and rod a semi-revolution thereby crossingthe ends of the pile thread,

a knOttenOnthe opposite side offthe said series of warp threads, and means .for re ciprocating the :knotter'to cause the same to t gage the'crossed pilethread to withdraw the pile thread between the set of warp threads to tiethe pile thread to the warp thread without moving the warp threads from their common plane; V a

In testimony whereof I have signed my name to this specification.

ALBERT "BLUM.

pass between the set of warp threads to en- 

